Table 4.

A comparison of the uncertainty measures of the DBN (section 6), static BN [15] and fuzzy logic assessment systems [14] expressed as a histogram of the ratio between the automatic quality metrics and manual error bars across a test-set of 2,672 samples for the conductivity sensors in Sullivans Cove. (a) Conductivity sensor situated at a depth of 1 m; (b) Conductivity sensor situated at a depth of 10 m.

Automatic EB / Manual EB	DBN		static BN		fuzzy logic
	instances	%	instances	%	instances	%
Above 300 %	0	0.0	14	0.5	157	5.9
200–300 %	154	5.8	112	4.2	140	5.2
150–200 %	226	8.5	139	5.2	138	5.2
66–150 %	2,054	76.9	1,802	67.4	993	37.2
50–66 %	131	4.9	268	10.0	342	12.8
33–50 %	86	3.2	204	7.6	365	13.7
Less than 33%	21	0.8	133	5.0	537	20.1
(a)

Automatic EB / Manual EB	DBN		static BN		fuzzy logic
	instances	%	instances	%	instances	%
Above 300 %	92	3.4	91	3.4	265	9.9
200–300 %	18	0.7	94	3.5	170	6.4
150–200 %	27	1.1	116	4.3	99	3.7
66–150 %	2,151	80.5	2,208	82.6	980	36.7
50–66 %	128	4.8	83	3.1	336	12.6
33–50 %	123	4.6	62	2.3	268	10.0
Less than 33%	133	5.0	18	0.7	547	20.5
(b)